noise reduction with isotope rx

[Matti]

If you look carefully my screenshot, I sampled also about the same way.
Somehow I cannot see Matts pics

Matti

P.S. Matti and Matthias, funny

[Alexey Lukin]

Originally Posted by Airon

Nice tip on the limited bandwidth. I'd been treating the the RX a little like the Cedar since they put envelopes in to the denoiser.

There's a better way of limiting Denoiser's bandwidth than making a time-frequency selection. You can use the white curve in the "Advanced" tab to achieve the same result smoother. It sets the amount of noise reduction that you want at different frequencies. If you drag it up, there's no change to the signal in that frequency range.

[Alexey Lukin]

Originally Posted by cinetj

Although I can erase completely the noise in the silent parts I can still hear a little of the noise when the voice kicks in.

It's because the original recording sounds like passed through some gentle noise gate - it makes noise fade-out between phrases, and RX underestimates its level. I'd raise the Threshold slider to fix it, along with careful selection of other parameters.

[Alexey Lukin]

Originally Posted by ErikG

If you can see the tonal issues a s a clear band around 500Hz with no major overtones Try to notch before using Noise Reduction. Notching and NR often compliment each other, not relying on one technique only often helps.

Tonal noise reduction feature of the Denoiser often works better for me than notch filtering, esp. when the amplitude of the tone is constant.

[danijel]

Originally Posted by ErikG

"Let the right one in" was mixed partially at our place but not by us unfortunately... Would have been fun to work on it. I just finished mixing the score for a german movie with the composer that wrote the score for LTROI.

Great reference My favorite movie this year.

[matt-o-]

Originally Posted by MATTI

P.S. Matti and Matthias, funny

or MATTI and matt-o- greetings to finland

[cinetj]

Originally Posted by Alexey Lukin

There's a better way of limiting Denoiser's bandwidth than making a time-frequency selection. You can use the white curve in the "Advanced" tab to achieve the same result smoother. It sets the amount of noise reduction that you want at different frequencies. If you drag it up, there's no change to the signal in that frequency range.

Advanced tab? Maybe you mean advanced tab in the advanced version. I've searched the normal version of the plug in and there's nothing like that. In the manual, there's a reference for psychacoustic supression and multi-resolution but both exclusive to the advance version. Unfortunately, I'll have to restreint myself to the band selection method.

[Alexey Lukin]

No, it's the Advanced tab of the Standard version. If you don't see the white curve there, it's time to download a free update of RX.

[cinetj]

Originally Posted by Alexey Lukin

No, it's the Advanced tab of the Standard version. If you don't see the white curve there, it's time to download a free update of RX.

True. Thanks. The great stuff also is that I can stay now in Pro tools instead of using the standalone application.

[Jfriah]

Here's today's task folks.

(the noisefloor peaks at -9)

[Jfriah]

(see above posting for the 'before')
-----------------------------------------


And, let's see:
5 bands of iZo Hum Removal at 60Hz
Three zaps with iZo Spectral Repair
and two zaps lightly (4dB) (but large on tonal) with iZo Noise
...ok, and a C4 in for good measure.



Voila.
(hey, it's for a doc, what can I say?)

Jeff

[Subsonic808]

How about this one? 2 passes of NR, a bit of hi-passing and a touch of spectral repair, all done in RX. Still needs some heavy de-essing and maybe a bit of gating...

[Jfriah]

C'mon Matti--you can't take the easy way out on this one.
"could do better". What kinda post is that with no product?
So could I! Like I said, it's a doc and with the other tracks playing, plays fine for my purposes.

Let's see what ya got.
(now that you've spent all weekend working on it, hahaha)
(and I know you have the PRO version of Rx)

Jeff

[Jfriah]

That's interesting, Chris. Yours is less-noisy than mine but because of the artifacting, I would pick mine (could be the fact that it is already mixed now hahaha). I'll have to try running de-essing on yours like you say, but I'd wager the high-freq-artifacting would still remain and would just become lower-freq.

Definitely cleaner than mine, though. Nice.

Jeff

[Subsonic808]

You are right, there are a few more artifacts in my version, but I think they can be covered up pretty easily. I tried to get it as clean as possible while I was waiting for a backup to finish. I guess a few more passes with a lower reduction rate would have produced less artifacts. If I had only had more time...

In your version I still hear quite a bit of the massive low end from the original, which got mangled by the NR process. Severely cutting all that rumble was the first step I took. In RX's spectral view you can quickly spot where the fundamental frequencies of the voice are and cut everything below (in this case 130Hz). The low end energy of ambient noise is often fluctuating quite a bit and it really helps to get rid of as much as possible before applying NR.

[Matti]

Originally Posted by Jfriah

C'mon Matti--you can't take the easy way out on this one.
"could do better". What kinda post is that with no product?
So could I! Like I said, it's a doc and with the other tracks playing, plays fine for my purposes.

Let's see what ya got.
(now that you've spent all weekend working on it, hahaha)
(and I know you have the PRO version of Rx)

Jeff

I cannot post you any samples as the attachments are not working somehow

-so I just skip lazy as I am

Matti

[Vytis]

Here's my attempt.
What are the rules? I've also inserted an instance of WaveArts Multidynamics.

[Subsonic808]

OK, now here is one that I worked on for a bit. I am quite pleased with the result. I applied a hi-pass, some spectral repair and 3 passes of NR in RX and then added some pre-insert volume automation, a C4 in expansion mode, a broadband expander, 2 layers of de-essing and finally a BBE exciter.

[Matti]

Well, that's a good version

Matti

[Jfriah]

Originally Posted by MATTI

I cannot post you any samples as the attachments are not working somehow

-so I just skip lazy as I am

Matti

Famous 'dodge'--haha, but yes I know what you mean. Were you trying AIF or WAV uploads? I've had problems before with AIF. Anyway, I still don't believe ya, hahahaha. (joking)

There's always more to play with. Off to listen to the others now.

[Jfriah]

Nice work, fellas. Vytis, the 'rules' are this is an isotope Rx thread so most should be done with it (any of the package), with notes about anything else/where in the chain, etc.

The 'before' is quite ugly. Total 'EPK'-style compression, noise floor from hell, boomy (EQ fix), ugh. But the afters, sounding like some version of mp3s, is much more acceptable to the home viewer.

Love those tools...sad that I use them each and everrrrrry day.

Jeff

[andreP]

Totally OT but....nice work indeed chaps.

But it's a shame that you need to do any work at all on a piece of dialog like this, with no other distracting sounds recorded. It sounds like the makers of this doc used the cheapest possible radio mic recorded directly to the camera with it's own noisy pre-amps. Shame! If they spent a little bit more money on just a better mic to work with their radio's, then you could spend more time on the important post sound issues to help tell the story.

Sorry, couldn't let this lie.....

[Jfriah]

Andre--thanks very much for the comments.

This is the worst piece of 'self-recorded' (meaning: camera op/producer) audio I've had from customers in the past while. Luckily this was a short section of the show BUT--I've also had to put RTAS X-Noise plugins on all the interview tracks for the entire show on this doc and one project before it.

It is really becoming tiresome when you try to explain 'just make sure you're sending a little more signal from the belt-pack the person is wearing and compensate down on the camera-receive end'.

'but it sounds fine to me when I'm shooting!'

85% of the stuff I'm getting lately (on projects like THIS) is wireless mic directly recorded to camera--mostly RED. That is the worst combination I've heard in awhile and isn't going away. The one on my current production, the peak average conversation level on the track is -35 and the radio hiss is riding on the waveforms only/mainly.

And then I turn it all up to 79 and the clients freak out.

Sad.
Jeff

[Matti]

If they are regular customers suggest they bring the rig to your place and show them?

Matti

[Jfriah]

Nobody listens.
Age old problem.

Oh. Wait. They sure DO listen when it comes time for mix approval and "what's with the noisy talking?"
"why does that sound like an mp3?"

I just tried explaining over the phone to someone last week, in fact, and got "well it sounds good to me and I really don't want to mess with it."



Jeff

[b2kguga]

Hello

i´m trying to clean a audio i have where the voice seems a bit echoed. It have a bit distortion that i´m unable to fix on izotope.

I´m not understanding how to eliminate the echo background sound that makes the voice seems a bit muffled.

can someone help me please ?

[kk@jamsync.com]

Has anyone had a chance to check out RX with PT 10?

[insomaniac]

Originally Posted by kk@jamsync.com

Has anyone had a chance to check out RX with PT 10?

It runs really well, as long as you have the 2.02 update installed. It plays well with handles, too, which can be hit or miss with other plugins right now.

[Jaymz]

Originally Posted by Jfriah

85% of the stuff I'm getting lately (on projects like THIS) is wireless mic directly recorded to camera--mostly RED. That is the worst combination I've heard in awhile and isn't going away

Very sad indeed. If you're shooting on a 25,000 dollar camera there should be a mixer/recordist on-set.

[seanmccoy]

Originally Posted by Jaymz

Very sad indeed. If you're shooting on a 25,000 dollar camera there should be a mixer/recordist on-set.

I just mixed a movie where the mixer used Schoeps booms and lavs and a Sound Devices mixer patched into the four channels of the RED, and in general the audio sounded like doo-doo. I read a couple of reviews that said the preamps on the RED were only good enough for scratch audio, but I'm wondering if the converters and/or line amps might be really bad as well.

Izotope RX got quite a workout on this project.